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mojhsa [17]
3 years ago
14

Use substitution to solve the linear system of equations.

Mathematics
1 answer:
USPshnik [31]3 years ago
8 0

Answer:

(- 1, 5 )

Step-by-step explanation:

substitute y = 5 into the other equation

6x + 20 = 14 ( subtract 20 from both sides )

6x = - 6 ( divide both sides by 6 )

x = - 1 and y = 5 ← given

solution (- 1, 5 )


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Solve the following system of equations by graphing: 2x + 6y = 20 3x − 2y = 8
denpristay [2]
2x + 6y = 20
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I'll just substitute x and y with its corresponding values per option.

A) x = 4 ; y = 2
2(4) + 6(2) = 20        3(4) - 2(2) = 8
8 + 12 = 20                12 - 4 = 8
20 = 20                        8 = 8

B) x = 4 ; y = -2
2(4) + 6(-2) = 20
8 - 12 = 20
-4 ≠ 20

C) x = -2 ; y = 4
2(-2) + 6(4) = 20        3(-2) - 2(4) = 8
-4 + 24 = 20                -6 - 8 = 8
20 = 20                         - 14 ≠ 8

D) x = 2 ; y = 4
2(2) + 6(4) = 20
4 + 24 = 20
28 ≠ 20

Choice A. x = 4 ; y = 2 is the correct answer.

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3 years ago
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Oduvanchick [21]
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